main.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5
   6 #include <stdarg.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 #include <X11/cursorfont.h>
  12 #include <X11/Xatom.h>
  13 #include <X11/Xproto.h>
  14
  15 #include "dwm.h"
  16
  17 /********** CUSTOMIZE **********/
  18
  19 char *tags[TLast] = {
  20         [Tscratch] = "scratch",
  21         [Tdev] = "dev",
  22         [Tirc] = "irc",
  23         [Twww] = "www",
  24         [Twork] = "work",
  25 };
  26
  27 /********** CUSTOMIZE **********/
  28
  29 /* X structs */
  30 Display *dpy;
  31 Window root, barwin;
  32 Atom wm_atom[WMLast], net_atom[NetLast];
  33 Cursor cursor[CurLast];
  34 Bool running = True;
  35 Bool issel;
  36
  37 int tsel = Tdev; /* default tag */
  38 int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
  39 char stext[1024];
  40
  41 DC dc = {0};
  42 Client *clients = NULL;
  43 Client *sel = NULL;
  44
  45 static Bool other_wm_running;
  46 static const char version[] =
  47         "dwm-" VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
  48 static int (*x_error_handler) (Display *, XErrorEvent *);
  49
  50 static void
  51 usage() {       error("usage: dwm [-v]\n"); }
  52
  53 static void
  54 scan_wins()
  55 {
  56         unsigned int i, num;
  57         Window *wins;
  58         XWindowAttributes wa;
  59         Window d1, d2;
  60
  61         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
  62                 for(i = 0; i < num; i++) {
  63                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
  64                                 continue;
  65                         if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
  66                                 continue;
  67                         if(wa.map_state == IsViewable)
  68                                 manage(wins[i], &wa);
  69                 }
  70         }
  71         if(wins)
  72                 XFree(wins);
  73 }
  74
  75 static int
  76 win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
  77 {
  78         Atom real;
  79         int format;
  80         unsigned long res, extra;
  81         int status;
  82
  83         status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
  84                         &res, &extra, prop);
  85
  86         if(status != Success || *prop == 0) {
  87                 return 0;
  88         }
  89         if(res == 0) {
  90                 free((void *) *prop);
  91         }
  92         return res;
  93 }
  94
  95 int
  96 win_proto(Window w)
  97 {
  98         unsigned char *protocols;
  99         long res;
 100         int protos = 0;
 101         int i;
 102
 103         res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L, &protocols);
 104         if(res <= 0) {
 105                 return protos;
 106         }
 107         for(i = 0; i < res; i++) {
 108                 if(protocols[i] == wm_atom[WMDelete])
 109                         protos |= WM_PROTOCOL_DELWIN;
 110         }
 111         free((char *) protocols);
 112         return protos;
 113 }
 114
 115 void
 116 send_message(Window w, Atom a, long value)
 117 {
 118         XEvent e;
 119
 120         e.type = ClientMessage;
 121         e.xclient.window = w;
 122         e.xclient.message_type = a;
 123         e.xclient.format = 32;
 124         e.xclient.data.l[0] = value;
 125         e.xclient.data.l[1] = CurrentTime;
 126         XSendEvent(dpy, w, False, NoEventMask, &e);
 127         XFlush(dpy);
 128 }
 129
 130 /*
 131  * There's no way to check accesses to destroyed windows, thus
 132  * those cases are ignored (especially on UnmapNotify's).
 133  * Other types of errors call Xlib's default error handler, which
 134  * calls exit().
 135  */
 136 int
 137 error_handler(Display *dpy, XErrorEvent *error)
 138 {
 139         if(error->error_code == BadWindow
 140                         || (error->request_code == X_SetInputFocus
 141                                 && error->error_code == BadMatch)
 142                         || (error->request_code == X_PolyText8
 143                                 && error->error_code == BadDrawable)
 144                         || (error->request_code == X_PolyFillRectangle
 145                                 && error->error_code == BadDrawable)
 146                         || (error->request_code == X_PolySegment
 147                                 && error->error_code == BadDrawable)
 148                         || (error->request_code == X_ConfigureWindow
 149                                 && error->error_code == BadMatch)
 150                         || (error->request_code == X_GrabKey
 151                                 && error->error_code == BadAccess))
 152                 return 0;
 153         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
 154                         error->request_code, error->error_code);
 155         return x_error_handler(dpy, error); /* may call exit() */
 156 }
 157
 158 /*
 159  * Startup Error handler to check if another window manager
 160  * is already running.
 161  */
 162 static int
 163 startup_error_handler(Display *dpy, XErrorEvent *error)
 164 {
 165         other_wm_running = True;
 166         return -1;
 167 }
 168
 169 static void
 170 cleanup()
 171 {
 172         while(sel) {
 173                 resize(sel, True);
 174                 unmanage(sel);
 175         }
 176         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 177 }
 178
 179 void
 180 quit(Arg *arg)
 181 {
 182         running = False;
 183 }
 184
 185 int
 186 main(int argc, char *argv[])
 187 {
 188         int i;
 189         XSetWindowAttributes wa;
 190         unsigned int mask;
 191         Window w;
 192         XEvent ev;
 193
 194         /* command line args */
 195         for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
 196                 switch (argv[i][1]) {
 197                 case 'v':
 198                         fprintf(stdout, "%s", version);
 199                         exit(0);
 200                         break;
 201                 default:
 202                         usage();
 203                         break;
 204                 }
 205         }
 206
 207         dpy = XOpenDisplay(0);
 208         if(!dpy)
 209                 error("dwm: cannot connect X server\n");
 210
 211         screen = DefaultScreen(dpy);
 212         root = RootWindow(dpy, screen);
 213
 214         /* check if another WM is already running */
 215         other_wm_running = False;
 216         XSetErrorHandler(startup_error_handler);
 217         /* this causes an error if some other WM is running */
 218         XSelectInput(dpy, root, SubstructureRedirectMask);
 219         XFlush(dpy);
 220
 221         if(other_wm_running)
 222                 error("dwm: another window manager is already running\n");
 223
 224         XSetErrorHandler(0);
 225         x_error_handler = XSetErrorHandler(error_handler);
 226
 227         /* init atoms */
 228         wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
 229         wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
 230         net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 231         net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 232         XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
 233                         PropModeReplace, (unsigned char *) net_atom, NetLast);
 234
 235         /* init cursors */
 236         cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
 237         cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
 238         cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
 239
 240         update_keys();
 241
 242         /* style */
 243         dc.bg = initcolor(BGCOLOR);
 244         dc.fg = initcolor(FGCOLOR);
 245         dc.border = initcolor(BORDERCOLOR);
 246         initfont(FONT);
 247
 248         sx = sy = 0;
 249         sw = DisplayWidth(dpy, screen);
 250         sh = DisplayHeight(dpy, screen);
 251         mw = (sw * MASTERW) / 100;
 252
 253         wa.override_redirect = 1;
 254         wa.background_pixmap = ParentRelative;
 255         wa.event_mask = ExposureMask;
 256
 257         bx = by = 0;
 258         bw = sw;
 259         dc.h = bh = dc.font.height + 4;
 260         barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
 261                         CopyFromParent, DefaultVisual(dpy, screen),
 262                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 263         XDefineCursor(dpy, barwin, cursor[CurNormal]);
 264         XMapRaised(dpy, barwin);
 265
 266         issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
 267
 268         wa.event_mask = SubstructureRedirectMask | EnterWindowMask \
 269                                         | LeaveWindowMask;
 270         wa.cursor = cursor[CurNormal];
 271
 272         XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
 273
 274         dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 275         dc.gc = XCreateGC(dpy, root, 0, 0);
 276
 277         strcpy(stext, "dwm-"VERSION);
 278         scan_wins();
 279         draw_bar();
 280
 281         while(running) {
 282                 XNextEvent(dpy, &ev);
 283                 if(handler[ev.type])
 284                         (handler[ev.type])(&ev); /* call handler */
 285         }
 286
 287         cleanup();
 288         XCloseDisplay(dpy);
 289
 290         return 0;
 291 }